Wood-sawing machine



(No Model.)

I. H. BERTRAM. Woon SAWING MACHINE.

No. 888,181. 11818111611 Aug. 18, 1887.

N. PETERS, PhumLnhagl-aphr, washington, 0,0.

UNITED STATES ATENT Orrrcn.

ISAAC HENRY BERTRAM, OF BROCK, OHIO.

WOOD-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 368.181, dated August 1G, 1887A Application iled April 25, i987.

To all whom t may concern.'

Be it known that I, Isaac HENRY BnR'rnAM, a citizen ofthe United States of America, residing at Brock, in the county of Darke and State of Ohio, havcinvented certain new and useful Improvements in Vood-Sawing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to wood-sawing machines designed to fell trees and to eut them up into lengths suitable lfor fire-wood, felicerails, Src.; and it consists in certain details of construction and combi nations of parts, which will first be described in connection with the accompanying drawings, and then pointed ont in the claims.

Figure lis a perspective view of my inachine7 with the saw arranged for cutting standing tiinber. Fig. 2 is a longitudinal section of the machine, with the saw arranged to cut the timber into lengths while lying on the ground.

Referring to the annexed drawings, A represents the frame of the machine, comprising a rectangular base, two uprights rising from opposite sides of the base, and a beam uniting the nprights at the top.

B represents a rock-shaft loosely journaled in the nprights, to the under side of which shaft is rigidly secured a slotted arm, C, formed with bolt'holes c, and to the upper side of the rock-shaft is secured an operating-lever, l), braced by a rod, d.

E represents a vertical saw-guide mounted centrally on the forward end of the base of the machine-frame and in alignment with the slotted arm secured to the rock-shaft. This guide is simply a post slotted in two directions, the slots being at right angles to each other, as seen at c c.

F represents a horizontal sawguide, which is a strip of wood or other suitable material slotted nearly its entire length. One end of this guide is framed into a post, F, which is loosely pivotcd in the base ofthe traine at the front end and near one corner, and the other end of the guide is provided with a sliding catch, f, which engages with a mortise, c2, in saw-guide E.

G is the saw-arm, in the front end of which Serial No. $235,973. (No model.)

the saw II is lirnily secured. To the rear end of this arm, on its edges, is rigidly attached a metallic strap, g, through which is passed a staple, fi, inserted in a coupling-block, I, of wood or other suitable material, which is of a thickness to lit loosely in the slot in arm C, which block is thus hinged at right angles to the saw-arm. Bolt-holes 7i are formed also in the rear end of the saw-arm.

J represents a follower-block, located in the slot in the horizontal saw-guide, which is guided in said slot by means of pinsj, passed through the block on either side of the sawguide. To the ends of this follower-block are secured cords la, which pass through post F and are secured at their outer ends to a lever, li, fulcruined on a short post, L, journaled in brackets a, attached to one of the nprights of frame A.

M represents a support for the saw when not in operation, which support is a strip ot' wood passed through slot c of the vertical saw-guide and held in proper position in said slot by means of pins m, passed through the support on each side of the saw-guide. Cords N are attached to cach end of this support and pass upward over pulleys O, journaled on a short shaft, o, passed through the upper end of the vertical saw-guide, and the upper ends of these cords are secured to a lever, I?, fulcrnmed Aon an arm, p, loosely journaled in short standards a', rising from the beam of frame A.

Q represents a hooked rod for engaging with lever I.) to hold the saw-support in an elevated position, as seen in dotted lilies in Fig. 2, one end of the rod being secured to the base of the machineframe.

The operation of my machine is as follows: Vhen it is desired to cut down a tree, the sawarm is passed flatwise through the slot in the horizontal guide in front of follower-block J, and coupling-block I is placed in the slot in. arm C and secured therein by the bolt b,passcd through said arm and the perforation in the block. lhesaw having been placed against the tree, the operator takes hold of lever D with one hand and operates the rock-shaft, thereby giving the saw a to-and-fro movement, and with his other hand gently draws on lever K, which causes the lollowcr-block to press on to its Work.

the rear side of the saw-arm and hold the saw When the tree is down and it is desired to eut it up into lengths, block I is disengaged from the rock-shaft arm and the saw-arm is Withdrawn from` the horizontal saw-guide, which latter is then disengaged from the vertical saw-guide and swung to the dotted-line position shown in Fig. 1, where it will be out of the way. The saw-arm is then passed through slot e of guide E above the saw-support M, and its rear end is secured in the rock-shaft arm by bolt b, passed through the latter and one of the bolt-holes -h in the saw-arm. The saw is then operated by means of lever D and the rock-arm, as before.

Should it be desirable to shorten the strokes of the saw, as when cutting a small log, the saw-arm is raised to the upper hole in the rock-shaft arm. Vhen the ent is made, the saw is elevated by pulling down the free end of lever P, which movement raises the sup-- portM,and with itthe saw-arm,and the hooked rod Q is then engaged with the free end of the lever, all as clearly shown in dotted lines in Fig. 2.. 4 A

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-.

1. In a wood-sawing machine, the combination, with the rock-shaft journaledin the main frame and provided with an operating-lever and a slotted arni, of the saw-arm provided at its front end with a saw, a coupling-block hinged to the rear end of the saw-arm at a right angle to the, eut of the saw, suitable means for securing the coupling-block to the rock-shaft arm, and a horizontal guide for the saw-arm, substantially as described.

2. The combination, with the rock-shaft j ournalcd in the main frame and provided withY an operating-lever and a slotted arm, of the saw-arm carrying a saw at its front end, perforated at its rear end for Vthe reception of a bolt, and provided with a coupling-block hinged to the saw-arm at a right angle to the cut of the saw, suitable means for securing said arm to the roel -sl1aft arm, a horizontal saw-guide and a vertical sawguide, whereby the saw can be arranged at will to make either a horizontal or a vertical eut, substantially as described. Y

3. The combination, in a sawing-machine of the class described, of a vertical saw-guide and a horizontal saw-guide, one end. of the latter being detaohably secured to the former and the other end rigidly secured to a post loosely pivoted in the machine-frame,whereby the horizontal guide may be swung out of the way when not required for use, substantially as described.

4. In a woodesawing machine, the combination, with a horizontal saw-guide, substantially as described, and a saw-arm movable therein, of a follower-block located in the said guide in rear of the saw-blade, a lever fulerunned at the side of the main frame, and cords connecting thezfollower-block with said lever, for the purpose set forth.

In testimony whereof I afIiX my signature in presence of two witnesses.

ISAAC HENRY BERTRAM,

Witnesses: i

NEWTON Lions, CHARLES F. LYoNs. 

